The purpose of this article is to provide the
minimum requirements and material standards for the design and construction
of roads and pavements and the necessary grading standards for new
construction within any public right-of-way or easement.
Standards for pavements are as follows.
[Amended 12-11-2007 by L.L. No. 3-2007]
The purpose of the grading plan is to provide a means of adequate drainage for surface runoff while providing protection of both persons and property. Except in accordance with a stormwater pollution prevention plan approved by the Town in accordance with §
245-61 of the Town Code, positive drainage should be provided over the extent of the project site as well as provisions for drainage of adjacent lands which presently drain onto the project area. This may be done by use of existing drainage facilities, with improvements as warranted and/or construction of new structures or ditches.
[Amended 12-11-2007 by L.L. No. 3-2007]
A. Pavements.
(1) All pavement areas shall be adequately drained of
surface runoff.
(2) Runoff from the project site shall not be allowed
to be discharged onto adjacent open lands or pavement areas. On-site
positive drainage is required. Curbs, swales, berms and ditches may
serve as a barrier for drainage across adjacent properties.
(3) Drainage structures shall be so located as to provide positive drainage of pavement areas without ponding. Storm drains shall be sized per the requirements of §
135-48, Storm drainage design criteria, unless the project is subject to regulation under Article
XIV of Chapter
245, Zoning, of the Town Code, in which case storm drains shall be sized in accordance with the standards set forth therein.
(4) Pavements should be graded so that adjacent buildings
and open areas can accept surface runoff freely at all times. If open
areas cannot be drained in this manner, additional drainage structures
shall be provided.
(5) Under no circumstances will pavement areas other than
sidewalks, driveway aprons or drive approaches be allowed to drain
onto the adjacent right-of-way without permission of the Town of Niagara
and/or the agency whose jurisdiction the right-of-way applies.
(6) Minimum grades.
(a)
Concrete (roadways or approaches): 0.50%.
(b)
Concrete driveways and sidewalks: 1/4 inch per
foot (cross-slope).
(c)
Asphalt pavement: as directed by Highway Superintendent
and Town Engineer, after review.
(7) Stormwater pollution prevention plan. Notwithstanding
the foregoing, the design and construction of all pavement areas shall
comply with any stormwater pollution prevention plan (SWPPP) approved
by the Town. Minimum grades shall not apply and positive drainage
shall not be required where grading and drainage facilities have been
approved by the Town pursuant to a SWPPP.
B. Lawn and open areas.
(1) Lawn and open areas shall be positively drained by
use of swales, ditches and/or drainage structures. Such areas should
be seeded, sodded or provided with vegetation as to prevent erosion
of soils.
(2) Grading shall be provided such that adequate drainage
is provided in respect to the surface treatment.
(a)
Minimum grades over lawn and landscaped areas
should be 1%.
(b)
Minimum grades over undeveloped or unimproved
areas should be 1% if possible.
(c)
Minimum grades over gravel and stone should
be 1%.
(3) Drainage structures shall be constructed and connected
to a free outlet for all areas which cannot be adequately drained
by overland means.
(4) Stormwater pollution prevention plan. Notwithstanding
the foregoing, the design and construction of all lawn and open areas
shall comply with any stormwater pollution prevention plan (SWPPP)
approved by the Town. Minimum grades shall not apply and positive
drainage shall not be required where grading and drainage facilities
have been approved by the Town pursuant to a SWPPP.